Back to EveryPatent.com
United States Patent | 5,780,961 |
Power | July 14, 1998 |
A thin layer of alumina (aluminum oxide) is coated onto the ground plane of a microchannel plate (MCP) without covering the pores of the MCP so it does not effect the performance. The coating is sputtered onto the ground plane at a very steep angle. The addition of the thin dielectric coating of alumina greatly improves the spatial resolution of proximity focused image intensifiers using a narrow gap between the phosphor screen and the MCP. With the coating on the ground plane and the same gap the phosphor screen can be ran at 9000 volts, as compared to 3 kV without the coating.
Inventors: | Power; Gary D. (Manteca, CA) |
Assignee: | Regents of the University of California (Oakland, CA) |
Appl. No.: | 026797 |
Filed: | March 5, 1993 |
Current U.S. Class: | 313/376 |
Intern'l Class: | H01J 043/04 |
Field of Search: | 313/376,377,379,387,528,534 250/214 VT |
3609433 | Sep., 1971 | Freedman | 313/65. |
3760216 | Sep., 1973 | Lasser et al. | 313/528. |
4310857 | Jan., 1982 | Lieber et al. | 358/217. |
4350919 | Sep., 1982 | Johnson et al. | 313/99. |
4481531 | Nov., 1984 | Warde et al. | 313/528. |
4725723 | Feb., 1988 | Shimojima | 250/205. |
4902930 | Feb., 1990 | Van Der Mast | 315/12. |
4996414 | Feb., 1991 | Frank et al. | 250/213. |
5268612 | Dec., 1993 | Aebi et al. | 313/528. |